Uninterrupted consecutive streaks at the grand slam tournaments. The list includes all active players who have reached the 4th round (or better) at two slam tournaments in a row at least once in their career.

Notes: It's probably surprising that Seles' best streak is only 6 tournaments, but what a streak: 5 titles and a final 1991-1993! We know why this streak ended

Navratilova reached the 4th round at 35 consecutive slams 1980-1989 winning 15 titles and reaching another 8 finals during this streak. Only three tournaments during this streak ended at the 4th round.

Graf's worst result in her 19-tournament streak was a quarterfinal. She reached at least the semifinal in 18 of the tournaments! And she won 10 titles (5 in a row).

Hingis won 5 titles during her best streak of 12 (and was runner up 3 times).